001/* 002 Licensed to the Apache Software Foundation (ASF) under one 003 or more contributor license agreements. See the NOTICE file 004 distributed with this work for additional information 005 regarding copyright ownership. The ASF licenses this file 006 to you under the Apache License, Version 2.0 (the 007 "License"); you may not use this file except in compliance 008 with the License. You may obtain a copy of the License at 009 010 http://www.apache.org/licenses/LICENSE-2.0 011 012 Unless required by applicable law or agreed to in writing, 013 software distributed under the License is distributed on an 014 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 KIND, either express or implied. See the License for the 016 specific language governing permissions and limitations 017 under the License. 018 */ 019package org.apache.wiki.tags; 020 021import org.apache.log4j.Logger; 022import org.apache.wiki.api.core.Engine; 023import org.apache.wiki.api.core.Page; 024import org.apache.wiki.api.exceptions.ProviderException; 025import org.apache.wiki.pages.PageManager; 026 027import java.io.IOException; 028 029/** 030 * Returns the currently requested page or attachment size. 031 * 032 * @since 2.0 033 */ 034public class PageSizeTag extends WikiTagBase { 035 036 private static final long serialVersionUID = 0L; 037 private static final Logger log = Logger.getLogger( PageSizeTag.class ); 038 039 @Override 040 public final int doWikiStartTag() throws IOException { 041 final Engine engine = m_wikiContext.getEngine(); 042 final Page page = m_wikiContext.getPage(); 043 044 try { 045 if( page != null ) { 046 long size = page.getSize(); 047 048 if( size == -1 && engine.getManager( PageManager.class ).wikiPageExists( page ) ) { // should never happen with attachments 049 size = engine.getManager( PageManager.class ).getPureText( page.getName(), page.getVersion() ).length(); 050 page.setSize( size ); 051 } 052 053 pageContext.getOut().write( Long.toString(size) ); 054 } 055 } catch( final ProviderException e ) { 056 log.warn("Providers did not work: ",e); 057 pageContext.getOut().write("Error determining page size: "+e.getMessage()); 058 } 059 060 return SKIP_BODY; 061 } 062 063}